Just to satisfy my curiosity about the comments here on Digital Unix's size, I telnet'd into my ISP running Digital Unix.

-rwxr-xr-x 1 root system 9388376 Apr 26 12:10 vmunix.old

Now that's big!

Note, that may be a debugging kernel, those can grow from the normal(!) 3MB to 6MB or more for most commercial OS's. But then again Ialso just checked my nearby Alpha/AXP box and sure enough the suckeris similar in size: